Path Traversal Vulnerability in SonicCloudOrg sonic-server Affects Remote File Upload
CVE-2026-6620

5.3MEDIUM

Key Information:

Vendor

Soniccloudorg

Status
Sonic-server
Vendor
CVE Published:
20 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-6620?

A security vulnerability exists in the file upload component of SonicCloudOrg's sonic-server. Specifically, the function Upload in FileTool.java is susceptible to path traversal attacks due to improper handling of the Type argument. This flaw allows remote attackers to manipulate the input and access unauthorized files on the server. The public disclosure of this exploit poses a significant risk, as it can be easily executed without any response from the vendor, raising concerns for users of affected versions.

Affected Version(s)

sonic-server 2.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-6620 - Proof of Concept

References

https://vuldb.com/vuln/358255
vdb-entrytechnical-description
https://vuldb.com/vuln/358255/cti
signaturepermissions-required
https://vuldb.com/submit/792336
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

cccccccti (VulDB User)
VulDB CNA Team
.